Maternity pants: how soon is too soon ?

Missy
Warning: completely vain and not-so-important post ahead.....So, I am fully aware I don't have a bump yet - I know my belly is pre-existing fat+bloat. But, Good Lord, my pre-pregnancy jeans are about to kill me. I'm right at 6 weeks, and these babies are definitely not cute anymore! What is the reasonable point to embrace the sweetness of the expandable waist on maternity pants? Or should I invest in jeggings until I have a legit bump?